Espresso paper filters: Weber EPF sizes and placement

For Weber EPF, choose Regular 55 mm paper for the maker's named standard 58 mm and VST baskets with a 55 mm bottom, or Unibasket 58 mm paper for Unibasket and Unifilter. Place it under the coffee, smooth side up. An uncertain basket needs its maker's advice; paper size cannot confirm machine or holder fit.

Match the paper to the basket bottom

Choose between Weber Workshops' two EPF paper sizes using its named basket pairings. Its Regular paper measures 55 mm and is intended for standard 58 mm and VST baskets with a 55 mm bottom. Its Unibasket paper measures 58 mm and is intended for Unibasket and Unifilter. Those are Weber's named pairings, rather than a rule for every basket sold as 58 mm.

What you have	Weber's named paper	What still needs checking
Standard 58 mm or VST basket with a 55 mm bottom	Regular EPF, 55 mm	Exact basket identity and bottom size
Weber Unibasket or Unifilter	Unibasket EPF, 58 mm	Exact product and current maker instructions
Another basket, or an uncertain replacement	No confirmed selection here	Ask its maker for the bottom-paper size and permitted use

The portafilter size chart can help identify your machine and holder. A holder's nominal size alone won't settle this choice. The basket is the removable metal cup that holds the coffee; the portafilter is the handled holder around it.

Count the whole preparation setup: your existing holder and basket, the matching paper, and one extra placement step each time. If that basket already suits your coffee, keep it. Paper adds a small task to your morning, so choose it for a reason you can name.

Place the named paper underneath the coffee

Weber specifies bottom placement for EPF, with the smooth side facing the coffee and the textured side facing the basket holes. This placement differs from a metal puck screen, which sits above the packed coffee. Do not transfer a paper product's directions to a screen or to another paper brand.

Check the pairing with the basket cool, empty and away from the machine. Read the basket and paper identifiers together. Set the named paper flat on the basket bottom in the specified orientation; do not fold an oversized disc up the wall to make it fit. Stop if the pairing is uncertain or the paper cannot lie flat, and ask the maker before brewing.

This is a cold placement check. It does not confirm machine compatibility, pressure safety or a better shot. Follow the exact machine manual for operation, releasing pressure, shutdown and cooling before handling used parts.

Keep a basket purchase separate

Keep your existing basket if it already suits your recipe. Paper selection is no reason to replace it. A new basket adds a separate fit question, even when the size sounds familiar.

Weber's Unibasket page includes a pack of Unifilter-size EPFs with the basket. It also lists holder exclusions, depth limits and a minimum bottom opening. Its exclusions include bottomless holders (holders open underneath the basket) by Breville, Gaggia, ECM, Slayer and Rancilio, among other model-specific caveats. Read the current compatibility section for your exact holder; a matching paper disc cannot resolve those restrictions.

For example, imagine a replacement basket described only as "58 mm." You still cannot choose between Weber's two papers from that description. Find the basket's part number and ask its maker which bottom paper it accepts. Keep that reply with the paper packet.

No new brewing experiment is needed to resolve a missing part identity. Ask about the part while everything stays cool and empty.

Decide whether the extra step earns its place

Keep a recipe you already enjoy while you decide whether paper solves a problem you have. Weber describes brewing benefits, but we have no measured result for your setup. We do not recommend paper as a health treatment, a guaranteed taste improvement or a repair for uneven flow.

If your next task is improving the cup, record dose (dry coffee weight), drink weight, grind setting and taste in the dial-in guide. Change one thing at a time once the equipment is confirmed suitable. If your coffee already tastes good and you prefer fewer preparation steps, carry on with your current routine.

Weber discourages washing and reusing its EPFs because performance decreases with reuse. Use the current directions for the exact paper you choose. Do not borrow a reusable metal screen's cleaning routine for paper.